Geometric Objects

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Though the SAT will give you some of the geometric objects facts, but you should memorize them as well. Getting familiar with those formulas will save you time on test day.

2D Shapes

The area of a square is

L x W

If you just add in the next dimension, you will get the volume cube

L x W x H

The formulas can be applied to all those objects that have two congruent 2D shapes such as a cylinder.

As the circle’s area is

Πr2

A cylinder volume is that multiplied by the other dimension as

Πr2 h

Furthermore, if want to find the distance between two points in a figure then always start with the two-dimensional shapes i.e. the faces of the object and then find measurements from there. Also, you should draw in extra lines that the figure lacks. It will make easier to work with as pieces of 2D shapes like triangles.

3 D Shapes

There are questions on SAT who try their best to confuse students about vertexes, edges, and sides. Don’t fall in the trap. Simply remember that a side has two-dimensional shape. If you roll an object on a ground, it can possibly stand on the side. Moreover, compare that to an edge. An edge is a point where two sides meet. It’s always one-dimensional. Think of an edge of a knife and it will help you to remember the word. Also, a cube such as dice when rolled on the ground is never going to land on an edge. Finally, a vertex is a single point without any dimensions. It’s another word used for corner. For example, the tip of the cone can be a vertex.

Though most of the 3D shapes are not as difficult to deal with than their two-dimensional corresponding items. Visualizing can be a little tricky but don’t panic. Keep in mind to take one dimension at a time.

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